Study of air return mode lattice optimization of radiation air conditioning

Objective The comfort of the interior environment of ship cabins directly affects the physical and mental health of the passengers, as well as affecting the working efficiency of the crew and their degree of comfort. This study seeks to improve the thermal comfort of air conditioning systems in cabins.

Method Airpak is used to simulate and analyze the temperature, relative humidity, PMV-PPD and air age in the four air return modes of a typical single-occupant cabin of a ship, namely ‘different side up and down cycles’, ‘same side up and down cycles’, ‘different side down and up cycles’, and ‘same side down and up cycles’.

Results The simulation results show that the room temperature can be kept constant at 24℃, humidity can be maintained at about 50% and the humidity field distribution can be more uniform, while PMV distribution is more uniform with its value tending to 0, and the air age PPD distribution is more uniform with a very low value in the cabin.

Conclusion Using the optimization principle of lattice-order theory, the air return mode of ‘different side up and down cycles’ is the optimal scheme for a single-occupant cabin of a ship.